S. Costa

EDUCAÇÃO AMBIENTAL E A PRÁTICA DA HORTA ESCOLAR

S. Costa, Maria José de Holanda Leite, Rodrigo Mateus Lima Ribeiro, Amanda Alves Feitosa et autres

Performance of 3D-structured grinding wheels with multi-layer internal cooling channels

S. Costa, P. Capela, Amauri Hassui, João Ribeiro et autres

• Sacrificial 3D-printed inserts created multilayer channels in vitrified wheels. • Manufacturing method integrates with pressing-sintering, no post-processing. • Tangential force reduced by 49.3% with multi-layer internal channels. • Temperature variation dropped 58.6% with 3D-structured wheels. • Internal cooling doubled the removal …

pt, br (code pays fourni par la source)

Coolant flow in structured grinding wheels: CFD validation via high-speed imaging and particle tracking

S. Costa, Lucas B. Neves, João Ribeiro, Delfim Soares

• • CFD validated by particle tracking with ≤16 % deviation in velocities. • • High-speed imaging confirmed jet coherence predicted by CFD simulations. • • Channel inclination dictated jet velocity, direction, and flow stability. • • Positive oriented channels reduced grinding …

pt (code pays fourni par la source)

CFD analysis of multi-layer cooling channels in three-dimensionally structured grinding wheels

S. Costa, P. Capela, Amauri Hassui, João Ribeiro et autres

Minimizing heat damage and surface integrity loss in grinding depends on effective cooling. Conventional techniques, however, suffer with low efficiency because of the fast air barrier restricting fluid access. Grinding wheels with internal cooling channels have been suggested to solve this; nonetheless, …

pt, br (code pays fourni par la source)

Hortas escolares: semeando conhecimento na educação infantil

S. Costa, Andréa de Vasconcelos Freitas Pinto, Thamires Barroso Lima, Amanda Alves Feitosa et autres

As hortas escolares têm se consolidado como ferramentas pedagógicas eficazes na educação infantil, promovendo o aprendizado ativo, a consciência ambiental e hábitos alimentares saudáveis desde os primeiros anos de vida. Assim, a presente pesquisa teve como objetivo analisar os impactos da implantação …

br (code pays fourni par la source)

Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H → $$ \textrm{b}\overline{\textrm{b}} $$ decay channel in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

V. Chekhovsky, A. Hayrapetyan, В. Макаренко, A. Tumasyan et autres

A bstract A standard model effective field theory (SMEFT) analysis with dimension-six operators probing nonresonant new physics effects is performed in the Higgs-strahlung process, where the Higgs boson is produced in association with a W or Z boson, in proton-proton collisions at …

am, at, in, us, be, br (code pays fourni par la source)

Search for high-mass resonances in a final state comprising a gluon and two hadronically decaying W bosons in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

A. Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres

A bstract A search for high-mass resonances decaying into a gluon, g, and two W bosons is presented. A Kaluza-Klein gluon, g KK , decaying in cascade via a scalar radion R, g KK → gR → gWW, is considered. The final …

am, at, in, us, be, br, ve, mx (code pays fourni par la source)

Measurements of inclusive and differential cross sections for top quark production in association with a Z boson in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres

A bstract Measurements are presented of inclusive and differential cross sections for Z boson associated production of top quark pairs ( $$ \textrm{t}\overline{\textrm{t}}\textrm{Z} $$ t t ¯ Z ) and single top quarks (tZq or tWZ). The data were recorded in proton-proton …

am, at, in, us, be, br, ve, mx (code pays fourni par la source)

A New Grinding Wheel Design with a 3D Internal Cooling Structure System

S. Costa, P. Capela, Matheus Sathler de Souza, J.R. Gomes et autres

This work discusses challenges in conventional grinding wheels: heat-induced tool wear and workpiece thermal damage. While textured abrasive wheels improve heat dissipation, the current surface-only methods, such as those based on laser and machining, have high renewal costs. The proposed manufacturing technology …

pt (code pays fourni par la source)

Solidification and Heat-treatment Conditions Affecting the Tensile Properties and Fracture Feature of an Automotive AlSiMg Alloy

Carolina R. Barbosa, Hugo Azevedo, S. Costa, João Ribeiro et autres

br, pt (code pays fourni par la source)

Solidification and heat-treatment conditions affecting the tensile properties and fracture feature of an automotive AlSiMg alloy

Carolina R. Barbosa, Hugo Azevedo, S. Costa, João Ribeiro et autres

Abstract In this work, a study on the interrelationship between the solidification and heat-treatment processes parameters with tensile properties and fracture feature was performed with an automotive AlSiMg alloy. For that, samples of the horizontally solidified Al7Si0.3Mg (wt.%) alloy were subjected to …

br, pt (code pays fourni par la source)

Texturing Methods of Abrasive Grinding Wheels: A Systematic Review

S. Costa, M. Pereira, João Ribeiro, Delfim Soares

Creating textures on abrasive wheels is a strategy that allows a significant improvement in grinding operations. The reduction of the internal stresses in the workpiece and the temperature during the grinding operation generates an increase in the dimensional accuracy of the workpiece …

pt (code pays fourni par la source)